JVC TH-A75 manual Creating realistic sound fields

Creating realistic sound fields

Dolby Pro Logic II*

Dolby Pro Logic II has a newly developed multi-channel playback format to convert all 2-channel source including Dolby Surround into 5-channel (plus subwoofer) reproduction.

Matrix-based conversion method for Dolby Pro Logic II makes no limitation for the cutoff frequency of the surround treble and enables stereo surround sound unavailable with conventional Dolby Pro Logic.

Dolby Pro Logic II can reproduce spacious sound from original sound without adding any new sounds and tonal colorations.

Dolby Pro Logic II has two modes—Movie mode and Music mode.

Pro Logic II Movie (PL II MOVIE)—suitable for the reproduction of Dolby Surround encoded software bearing the mark ( DOLBY SURROUND ). You can enjoy a sound field very close to the one created with discrete 5.1-channel sounds. Pro Logic II Music (PL II MUSIC)—suitable for the reproduction of any 2-channel stereo software. You can enjoy wide and deep sound by using this mode.

•When Dolby Pro Logic II is activated, the PRO LOGIC II and SURROUND indicators light up on the display.

Dolby Pro Logic (Dolby Surround)*

Used to reproduce soundtracks of the software encoded with Dolby Surround ( DOLBY SURROUND ).

Dolby Surround encoding format records the left front channel, right front channel, center channel, and surround channel signal (total 4 channels) into 2 channels.

The Dolby Pro Logic decoder built in this system decodes these 2-channel signal into original 4-channel signals— matrix-based multi-channel reproduction, and allows you to enjoy a realistic surround sound in your listening room.

•When Dolby Pro Logic is activated, the PRO LOGIC and SURROUND indicators light up on the display.

*Manufactured under license from Dolby Laboratories. “Dolby,” “Pro Logic,” and the double-D symbol are trademarks of Dolby Laboratories.

**Manufactured under license from Digital Theater Systems, Inc. US Pat. No. 5,451,942 and other world-wide patents issued and pending. “DTS” and “DTS Digital Surround” are trademarks of Digital Theater Systems, Inc. Copyright 1996 Digital Theater Systems, Inc. All rights reserved.

DTS Surround

DTS-ES (Extended Surround)**

Used to reproduce multi-channel movie soundtracks of the

software encoded with DTS-ES ( ).

DTS-ES is another new digital surround encoding format, developed by Digital Theater Systems, Inc., that adds the third surround channel—surround back channel. (See “Dolby Digital EX” on page 27)

DTS ES has two types—DTS-ES Discrete 6.1-channel and DTS-ES Matrix 6.1-channel.

DTS-ES Discrete 6.1-channel—has been designed to encode (and decode) 6.1-channel signal discretely to avoid interference between each channel.

DTS-ES Matrix 6.1-channel—has been designed to add an extra surround channel to DTS Digital Surround 5.1-channel. By using a matrix encoding/decoding method, additional “surround back” channel signal is encoded (and decoded) in both the left and right surround channel signals.

•When DTS-ES is activated, the and SURROUND indicators light up on the display.

DTS Digital Surround**

Used to reproduce multi-channel soundtracks of the software

encoded with DTS Digital Surround ( ).

DTS Digital Surround is a discrete 5.1-channel digital audio format available on CD, LD, and DVD software.

Compared to Dolby Digital, DTS Digital Surround format has a lower audio compression ratio which enables it to add breadth and depth to the sounds reproduced. As such, DTS Digital Surround features natural, solid and clear sound.

•When DTS Digital Surround is activated, the and SURROUND indicators light up on the display.

NEO:6**

Neo:6 is a newly developed conversion method to create 6-channel (plus subwoofer) from analog/digital 2-channel source and DTS Digital Surround source.

Neo:6 has two modes—Neo:6 Cinema and Neo:6 Music:

Neo:6 Cinema—suitable for reproduction of surround encoded software.

Neo:6 Music—suitable for reproduction of music software.

•When NEO:6 is activated, the SURROUND indicator lights up on the display.

•DTS Digital Surround can be converted into 6.1-channel using NEO:6 (see page 24).

Playback software and reproduced channels for each Surround mode

Surround	Dolby Digital EX	Dolby Digital 5.1-channel	Dolby Pro Logic II	Dolby Pro Logic
mode
Playback	Dolby Digital EX	Dolby Digital 5.1-channel	2-channel software	Dolby Surround
software		Dolby Digital EX		2-channel stereo software
Reproduced	6.1 channels	5.1 channels	5 channels (+ subwoofer)	4 channels (+ subwoofer)
channels
Surround	DTS-ES Discrete	DTS-ES Matrix	DTS Digital Surround	Neo6: Cinema/
mode
	6.1-channel	6.1-channel		Neo6: Music
Playback	DTS-ES	DTS-ES	DTS Digital Surround	2-channel software
software	(with Discrete 6.1-channel	(with Matrix 6.1-channel
			DTS-ES	DTS Digital Surround
	signals)	signals)
Reproduced	6.1 channels	6.1 channels	5.1 channels	6 channels (+ subwoofer)
channels

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